Electric welding machine



Oct. 5 1926. 1,601,871

J. w. MEADOWCROFT ELECTRIC WELDING MACHINE Filed Nov. 2 1925 2Sheets-Sheet l INVENTOR.

JOSEPH W. MEADOWCROF'T BY WTTORNEY.

J. w. MEADowcR'oF ELECTRIC WELDING MACHINE Get. 5, 1926.

Filed Nov. 24, 25

2 SheetS-She et 2 FIGQ INVENTOR.

JOSEPH w MEADowcRoFT Pakeme Gm :5; E5326.

wm'rm STATE;

BGSEYEK MEA'DQWCROFT, G}? Y'HIIMKDELYRXA, TEENNSYLVANTIA 5331 I (A, 0153.?MKLA13331F813. FEEZHQYXJVANKA, A GEE- WARE Gr. LBTIDB MANUFAGTI x.-IE'OBATIOl' 2 E PENNSYLVANIA.

ELECTB-iifi Wm;

Mm'iicatign ma welding;

nwra par:

' SE 11$ me all conshrmted he xami afliy me X95} @1115. i

can mava blef These 'itiHiS q eiectrmie-s, which are m? w. the, other,in vertical 2121" With this type 0% machine a the weiding takes place 1hon H 1.721110, 1w zmrk being Plana Between vertical filhectmdes 3390fthe work, Q1

6: to be ab ie i211 mm.

Owing to he 551m 5250315, it is Mien dcsimbi W61 11 a p e chex- LT-nanl'wrimntai, and the gene: sbgect 31 the present mventrr .1

to :1 means Whm'aby the usual? ma- 2 to make due; p0 dale. 1n 0mm Wowsthe im'entisn seeks t0 provlde an arrangement by means 03": which amacbmca of the shame mentwzmd may ha used for Weldmg in, a plane m an.hormontal, with-- 01H; shiftr cw L mg the machine as Whale and withcmi;sub igcizag the weidiaqg ellantrcfi' 31? Hm liprocmixing ehactme in aLEQLS? IFATEN? the iiirrszciima 01: m

a m n g =1 mechneu arrangen nz;

iis a Emi rants} s n the 2311s 1g; pmrti 02111 when .T Q a the frameand? 211212112116 in w v sine tbs usuai-culumn 2 a mavable arm T0 ctmieholder 2 secvsed, has 431 is heid the usual verticafiy r astral 5, Waterwe'ied means;

paved atmchmens. Suppurie is. hnrimam posting on tha 11pm? and Qi Fairsin chat 15 an mimimtcy eiectreue and.

ma "E111.

I an; heir mgeth mi amlplsfw; 11 samura llo means 05 02: mm 1 Eat s7 31mgrower toga a: r'imway fa'mrx mowifiia has at he .pmvidsfi with a shanki3 projecting M. 17 through an awning 14: in am if the plates 1 .8 122shorter than titva gaging 1n hnlesfi farmed ma him;

Tm bloc? or new gth 3f the bhwks or, in sther WQI iS, shorterthan thegrooves if), so that a 5p m rziem'nnoe pra'vifiei bei'zweea the ex i.iihe 133.21,?

and in axial alinernent with. the electrode is a longer 18 This plungeris provided at a point. inside of the grooves with a plate or flange 19having beveled parallel end faces. This plate or flange Works Within aslot formed in the. block 12, the end vxalls 20 of this slot beinginclined at the plunger 18 is depressed.

Below the plate or flange 19 the plunger 18 is extended toforin a guideor tail piece 21 which Works through an opening in the blocks 9 and issupported upon a helical spring 22 contained in a housing 25 secured toor forming part of the bracket, 8. The lower end of the spring restsupon a dish carried by a set screw 24;. so that by adjusting this screw,the tension of the spring may be varied as desired.

Disposed in axial alinement with the auxiliary movable ele trode 16 isan auxiliary fixed electrode 253, also preferably Water cooled as bymeans of hose connections 2T.

.The electrode 26 is clamped in a post 25 held in the outer end of abracket 29 secured to the fixed arm 7 of the machine as by means ofbolts 30. This bracket is provided with a slot 31 through Which theelectrode 5 extends, the slot being of such shape and size as toentirely clear the electrode. That is to say, the electrode 5 andbracket 29 are entirely out of contact. v

In practice, all of the par 9 to 21, inclusive, are formed of materialhavin a high electrical conductivity, such as copper, so that theseparts may serve to convey the welding current.

The operation of n y improved attachment will be apparent. As thevertical movable electrode is lowered in the usual manner, it. willengage and depress the plunger 18,

thus shifting the block 12 to the left and forcing the electrode 16toward the fixed electrode 26, the Work, of course, being positionedbetween these electrodes in a substantially vertical plane. Current issupplied from one side of the circuit through the fixed arm '7, bracket2-). and post 28 to the electrode 26, and from the other side of thecircuit through the movable arm 3, electrode 5, plunger 18, and block 12t0 the electrode 16. Thus, the operatingniechaniszn. itself, serves as aconductor to convey the Welding'current to the auxiliary electrode.

In Figs. 5 and 6 I have illustrrtcd a. slightly modified construction.in this construction the plunger l8 carries the cam 19' which works inthe cam slot 20 of the bloclz 12 in manner generally similar to thadcscribci'lin connection with the a .augerncnt already discussed, theshape of the parts, however, showing a slightvariation.

The essential ditlcrence between the two electrode 16 and M to itsoriginal position alter th parts have t c been moved by engagement ofthe electrode 5 with the plunger,

While I have shown and described the auxiliary electrodes to and asbeing dis posed in :1 horizontal plu no so that the Weldlug plane isvertical, it obvious that they may be equally Well set at any otherdesired angle, since all that necessary is to cut the cam surilzu'es 15)and 20 in a correspondillg manner, and. of course, form the grooves ll.accordingly.

It will be particularly noted that the thrust for operating my improvedauxiliary electrode applied axially of "the electrode or, in otherWords, in the direction in which said electrode is designed to stand thestrain, and that no lateral or transverse stresses are developed in theelectrode 5. This is due to the fact that the clement 18 of theauxiliary electrode operating mechanism partakes of only a truerectilinear movement.

It will thus be seen that I have provided an attachment which can bereadily applied to the usual existing, types oi '\veldin; niachincs, andthat sullh attachment can be designed to Weld inriny desired plane. Itis therefore thought tages of the invention will be readily a preciatedby those skilled in the art without further discussion.

lVhat I claim is:

1. The combination With a Welding machine having the usual verticalmovable electrode, of an auxiliary electrode mounted to reciprocate atan angle thereto, means operated by said vertically movable elec* trodefor moving said auxiliary electrode, and a fixed electrode cooperatingwith said auxiliary electrode.

2. The combination with. a welding machine having the usual verticallymovable electrode, of an auxiliary electrode mounted to reciprocate atan angle thereto, means shiftahle in the direction of movement of andoperated by said vertically movable electrode for moving said auxiliaryelectrode, and a lived electrode cooperating with said auxiliaryelectrode. 7

3. The combination with a welding raw that the many advanating with saidchine having the usual vertically movable electrode, to reciprocate atan angle thereto, means including a plunger mounted in axial alinementwith said vertically movable electrode and operated thereby for movingsaid auxiliary electrode,

auxiliary electrode.

4. The combination with a welding machine having the usual verticallymovable electrode, of an auxiliary electrode disposed at an anglethereto, a plunger mounted for reciprocation in axial alinement withsaid vertically for said auxiliary electrode, said plunger and holderhaving cooperating cam surfaces whereby the shifting of said plungerserves to move said holder and auxiliary electrode.

5. The combination with a welding machine having the usual verticallymovable electrode, of an auxiliary electrode mounted to reci )rocate atan angle thereto, and means ior movin said auxiliary electrode, saidmeans including an element having a purely rectilinear movement andarranged to be engaged and shifted by said vertically movable electrode.

(3. The combination with a weldingmachine having the usual verticallymovable electrode, of an auxiliarytelectrode mounted to reciprocate atan angle thereto, and means arranged to be engaged and operated by saidvertically movable electrode for moving said auxiliary electrode, saidmeans being constructed to conduct the welding current directly fromsaid vertically movable electrode to said auxiliary electrode.

7. The combination with a Welding machine having the usual verticallymovable electrode, of an auxiliary electrodemounted of an auxiliaryelectrodemountedand a fixed electrode cooper-' therefor, and meansmovable electrode, and a holder for movement at an angle thereto, afixed electrode, means operated by said vertically movable electrode formoving said auxiliary electrode toward said fixed electrode, an a springfor moving it inthe opposite direction.

8. An attachment for Welding machines having afixed arm and verticallymovable electrode, said attachment comprising an auxiliary electrode andoperating means "for supportmgsaid parts on the fixed arm of the machinein such position that a portion of said operating means lies in thepatlioi travel of sai vertically movable electrode, so as to be engagedand actuated thereby.

9. An attachment for weldin machines having a fixed arm and verticafiymovable electrode, said attachment comprising an auxiliary electrode andoperating means therefor, and means for supporting said parts on theauxiliary electrode horizontal and a portion of the operating means in aposition to be engaged and actuated by said vertically movableelectrode.

10. An attachment for yvelding machines having a fixed arm andvertically movable electrode, said attachment comprising an auxiliaryfixed and an auxiliary movable electrode, and operating mechanism forthe latter, and means for supporting said parts on the fixed arm of themachine with said auxiliary electrodes in alinement and at an angle tothe vertical, and with a portion of said operating mechanism in aosition to be engaged and actuated by said vertically movable electrode.

In testimony whereof I hereunto afiix my signature. 1

JOSEPH W. MEADOWVCROFT.

the fixed arm of the machine with

